Superheater and economizer for horizontal smoke-tube boilers.



F. BURGER.

SUPERHEATER AND ECONOMIZER FOR HORIZONTALSMOKE TUBE BOILERS.

APPLICATION FILED FEB. 27. 1914.

1,143,501 Patented June 15, 1915.

2 SHEETS-SHEET I.

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THE NORRIS PETERS (1).. PHOTO-LITHO" WASHINGTON. D. C.

I ZONTAL SMOKE TUBE BOILERS. APPLICATION FILED FEB. 27. 1914.

Patented June 15, 1915.

l/ 1 K i a mn H A |H n nun-Hun NH F L m r L Jaw/ IF-IE NORRIS PETERS CO.. PHOTU-LITHQ, WASHINGTUN. D. C,

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FRANZ BfmGER, or MANNHEIM, GERMANY, AssIGNoR TO THE FIRM or term, or MANNHEIM, GERMANY.

HEINRICH SUIERHEATER AND ECONOMIZER FOR HORIZONTAL SMOKE- TUBE BOILERS.

TOaZZ whom z'tm'ay concern:

Be it known that I, FRANZ Bunenn, citizen of the German Empire, residing at 33 Heinrich LanZ strasse, Mannheim, Germany, have invented certain new and useful Improvements in Superheaters and ranging them within a single transverse zone withinsaid smoke box. 7

A further object of the present invention consists in continuing the annular smoke fiues downwardly in such manner as to provide a plurality of spaces through which the furnace gases pass, these spaces being provided with corresponding controlling valves or dampers and serving for the reception of the superheater and economizer 1 tubes.

In order that the present invention may be more clearly understood reference is made to the accompanying drawings illustrating certain embodiments of the invention by wayof example. i Figure 1 is a vertical section through the smoke box. of the boiler ofa semi-portable engine having my invention applied. Fig. 2 is a similar View to Fig. 1 showing a slight modification thereof. Fig. 3 isra longitudi nal vertical section through a semi-portable engine having the superheater and economizer tubes arranged in the manner shown in Fig. 1.

In the drawings a superheater system is illustrated of the type described in the specification of United States Patent #934,151 comprising sinuous tubes running parallel to the boiler axis.

According to the present invention instead of arranging the superheater tubes over their whole length concentric with the boiler around the inner shell as has already been proposed, the lower part of the superheater beneath the horizontal central plane is according to Figs. 1 and 3 continued vertically downwardly so that between the two Specification of Letters Patent.

Application filed February 27, 1914. Serial No. 821,595.

lower ends of the superheater a space is left for the reception of the very compact economizer.

According to Fig. 2 the concentric part of the superheater is somewhat shorter than 1n. the arrangement described in the aforesaid United States specification and only lengthened in the axial direction sufficient to provide the necessary heating surface. Directly beneath the superheater is arranged the economizer whose tubes are of the same length as the superheater. The smoke flue is in this case continued vertically downwardly from the lower end of the super heater and between the two halves of the economizer is left a space to receive the ash particles entrained by the furnace gases.

On the drawings a designates the annular superheater space within which the superheater tubes are arranged, Z2 designates the end tube plate, 0 the economizer spaces within which the economizer tubes are arranged, cl the space between the two halves of the economizer and a the down-take flue for the furnace gases.

In Figs. 1 and 3 the flue plates 1 and 3 form the inner shell of the smoke flues while 2, 4 and;5 designate controlling valyes or dampers, the valves 2 simultaneously constituting part of the inner shell. By means of the valves 2, 4 and 5 either the superheater alone or the economizer alone or both may be simultaneously traversed by the furnace gases or cut off therefrom. For the purpose of enabling both systems of tubes to l e run out they are preferably mounted upon rollers f, each system being mounted independ ently uponrollers as in Figs. 1 and 3 or in common with each other as in Fig. 2.

When both systems of tubes are put in communication with the furnace gases as will usually be the case, the gases will flow both through the superheater and the economizer in the opposite direction to the flow of the feed water in the economizer and the small weight and readily capable of access for cleaning purposes.

As shown in Fig. 3 the saturated steam is supplied from the horizontal boiler g by way of the pipe h to the lower tubular header i of the superlieater tubes is. In or der to prevent confusion, the superheater tubes are shown broken away. The superheater tubes pass in a sinuous course between the outer shell of the smoke box and the inner shell plates 1 and terminate above in a tubular header Z from which the steam is supplied by the pipe m to the steam engine n. The feed water is supplied to a tubular header 0 and passes through the economizertubes 7? in a sinuous course" to they tubular header 9 from which it is supplied to the boiler g. The gases from the furnace chamber 9, after passing through the smoke tubes .9 of the boiler (only a few. of which are shown for the sake of simplicity), enter the interior of the smoke box t and are drawn upwardly, dividing in the upper part of the smoke box and passing downwardly on both sides between the outer shell and the inner shell plates 1, heating the superheater tubes on their way. The gases then turn inwardly and pass downwardly through the economizer chambers into the flue a. It will thus be manifest that the gases flow in the opposite direction to the water and steam.

I claim V 1. The combination with the smoke box of a horizontal smoke-tube boiler, of a system of,, superheater tubes and a system of economizer tubes, both of which are arranged in a single transverse zone within said smoke box.

2. In combination with the smoke box of a horizontal smoke-tube boiler, smoke flues therein, the upper parts of said flues being concentric with the boiler axis and extending vertically downward at their lower parts, superheater tubes in the upper part of said fines and economizer tubes in the lower part of said lines.

3. In combination with the smoke box of a horizontal smoke-tube boiler, smoke fiues therein concentric at their upper parts with the boiler axis and open to the boiler end space, said smoke fines extending downwardly below the plane of the boiler axis,

superheater tubes arranged in said smoke flues, economizer flues disposed intermediate the lower ends of said smoke flues, economizer tubes in said economizer fines, valves controlling communication between SfllCl' the boiler axis and open to the boiler end space, said smoke flues extending downwardly below the'plane of the boiler axis, superheatcr tubes arranged in said smoke fines, economizer flues disposed intermediate the lower ends of said smoke fines and having a space between them communicating with said boilerend space,'economizer tubes in said economizer fines, valves controlling communication between said smoke flues and the furnace gas draw-oftspace beneath the same, valves controlling communication be tween said economizer fines and boiler end space, and. a valve in the space between said economizer flues.

5.1n combination with a horizontal smoke-tube boiler, a smoke box into the central part of which the smoketubes open, an inner shell within the smoke box open above to form two side fines, a plurality of sinuous superheater tubes in'th e upper part'of said flues and connected to the boiler and a plurality of sinuous feed water tubes in the lower part of said fiues, said sinuous tubes winding from front to back of the smoke box.

6. In combination smoke tube boiler, a smoke box into the central part of which the smoke tubes open, a plurality of sinuous superheated tubes ar ranged on both sides of and within said smoke box, a plurality of sinuous feed wa ter tubes sub acent to said superheater tubes, said sinuous tubes winding from front with a horizontal to back of the smoke box, a down-take fiuefi beneath the smoke box and inner plates on the inside of said s nuous tubes forming flues within which said sinuous tubes are contained, said flues extending on both sides of said smoke box from the'upper part thereof to said down-take flue. In testimony whereof I have aliixed my signature in presence of two witnessesl FRANZ BURGER. Witnesses:

H. MnYnns, S. S. BERGER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

